In a fanfic, their relationship could develop through a series of magical duels. Each duel is not just about fighting but also about learning about each other. Harry might learn about Bellatrix's past that made her the way she is, and Bellatrix could be impressed by Harry's growth as a wizard. This understanding gained from the duels could lead to a more complex relationship between them.
The relationship could develop uniquely if Fem Harry Potter uses her empathy skills. Since she is different from the original Harry, she might be more in tune with Bellatrix's pain and past traumas. For example, if she discovers that Bellatrix was once a victim of dark magic herself which led her to become a Death Eater, Fem Harry Potter could try to heal her. This would create a very different dynamic compared to the usual enmity between Harry and Bellatrix.
To develop their relationship realistically, the author could focus on their individual growth and how they influence each other. For instance, Luna could help Harry to be more open - minded and less focused on the obvious. Harry, in turn, could give Luna a sense of security. They might start by having small gestures like Harry giving Luna a book she's been looking for, and Luna making Harry a special charm. As these interactions increase, so does their romantic relationship.
They could start with a rocky relationship. For example, Harry might be jealous of Ben's position as king. But then, through shared experiences like facing a common enemy or working on a project for the good of Auradon, they start to understand each other better.
The relationship can be developed by having Snape protect Harry in unexpected ways. Maybe in a fanfic, there's a plot where some dark wizards are after Harry. Snape, secretly, uses his skills to keep Harry safe. Later, when Harry discovers this, Snape has to explain his actions. This explanation can be a turning point where they start to trust each other more. Snape can then start to offer words of comfort based on his understanding of Harry's situation. They could also start to work together on some small tasks, like researching a new potion that might help Harry in his fight against the dark side, which further cements their relationship.
There are also fanfictions that take a completely different turn and show a sort of begrudging respect between them. After a series of events where they both learn more about each other's pasts and motives, they start to respect the other's power and tenacity. This might not lead to friendship, but it does create a more nuanced relationship than just pure hatred.
At the Yule Ball, they could start by sharing a joke about the overly formal atmosphere. This simple moment of connection can be the start of a deeper relationship. As they dance, they might notice little things about each other, like the way Harry's eyes sparkle in the candlelight or how Luna's hair seems to have a life of its own. This mutual admiration can gradually turn into romantic feelings.
In a fanfic, their relationship could be developed through a magical project. Suppose the Ministry wants to create a new protective charm for the whole wizarding world. Harry Potter, with his unique experiences and skills, is invited to be part of the project. As they collaborate, they learn about each other's strengths and weaknesses. The Minister might be initially dismissive of Harry's unorthodox methods, but as they see the results, they start to trust and rely on each other more.
They could start by having a heart - to - heart conversation. Maybe Harry has always felt a bit overshadowed by Lemon's natural charm and she's always been a bit jealous of Harry's popularity. Through an honest talk, they begin to understand each other better.
The relationship can be developed through shared experiences. For instance, if they are both in a dangerous situation like being trapped in a cursed dungeon. They would have to rely on each other to escape. Harry could use his quick thinking and Neville could use his knowledge of magical plants to find a way out. This would strengthen their bond and make them trust each other more.
Another way is by exploring their magical similarities. Maybe they discover that they have some unique magical abilities that are related in some way. This could create a sense of kinship, even if they are on opposite sides of the moral spectrum. They might start to understand each other better through these magical connections.